# -*- coding: utf-8 -*-

"""
***************************************************************************
    GridAverage.py
    ---------------------
    Date                 : October 2013
    Copyright            : (C) 2013 by Alexander Bruy
    Email                : alexander dot bruy at gmail dot com
***************************************************************************
*                                                                         *
*   This program is free software; you can redistribute it and/or modify  *
*   it under the terms of the GNU General Public License as published by  *
*   the Free Software Foundation; either version 2 of the License, or     *
*   (at your option) any later version.                                   *
*                                                                         *
***************************************************************************
"""

__author__ = 'Alexander Bruy'
__date__ = 'October 2013'
__copyright__ = '(C) 2013, Alexander Bruy'

# This will get replaced with a git SHA1 when you do a git archive

__revision__ = '$Format:%H$'


from PyQt4.QtGui import *

from processing.core.GeoAlgorithm import GeoAlgorithm
from processing.parameters.ParameterVector import ParameterVector
from processing.parameters.ParameterTableField import ParameterTableField
from processing.parameters.ParameterNumber import ParameterNumber
from processing.outputs.OutputRaster import OutputRaster
from processing.gdal.GdalUtils import GdalUtils
from processing.tools.system import *


class GridAverage(GeoAlgorithm):

    INPUT = 'INPUT'
    Z_FIELD = 'Z_FIELD'
    RADIUS_1 = 'RADIUS_1'
    RADIUS_2 = 'RADIUS_2'
    MIN_POINTS = 'MIN_POINTS'
    ANGLE = 'ANGLE'
    NODATA = 'NODATA'
    OUTPUT = 'OUTPUT'

    #def getIcon(self):
    #    filepath = os.path.dirname(__file__) + '/icons/dem.png'
    #    return QIcon(filepath)

    def defineCharacteristics(self):
        self.name = 'Grid (Moving average)'
        self.group = '[GDAL] Analysis'
        self.addParameter(ParameterVector(self.INPUT, 'Input layer',
                          [ParameterVector.VECTOR_TYPE_POINT]))
        self.addParameter(ParameterTableField(self.Z_FIELD, 'Z field',
                          self.INPUT, ParameterTableField.DATA_TYPE_NUMBER,
                          True))
        self.addParameter(ParameterNumber(self.RADIUS_1, 'Radius 1',
                          0.0, 99999999.999999, 0.0))
        self.addParameter(ParameterNumber(self.RADIUS_2, 'Radius 2',
                          0.0, 99999999.999999, 0.0))
        self.addParameter(ParameterNumber(self.MIN_POINTS, 'Min points',
                          0.0, 99999999.999999, 0.0))
        self.addParameter(ParameterNumber(self.ANGLE, 'Angle',
                          0.0, 359.0, 0.0))
        self.addParameter(ParameterNumber(self.NODATA, 'Nodata',
                          0.0, 99999999.999999, 0.0))

        self.addOutput(OutputRaster(self.OUTPUT, 'Output file'))

    def processAlgorithm(self, progress):
        arguments = ['-l']
        arguments.append(
                os.path.basename(os.path.splitext(
                        unicode(self.getParameterValue(self.INPUT)))[0]))

        fieldName = self.getParameterValue(self.Z_FIELD)
        if fieldName is not None and fieldName != '':
            arguments.append('-zfield')
            arguments.append(fieldName)

        params = 'average'
        params += ':radius1=%s' % self.getParameterValue(self.RADIUS_1)
        params += ':radius2=%s' % self.getParameterValue(self.RADIUS_2)
        params += ':angle=%s' % self.getParameterValue(self.ANGLE)
        params += ':min_points=%s' % self.getParameterValue(self.MIN_POINTS)
        params += ':nodata=%s' % self.getParameterValue(self.NODATA)

        arguments.append('-a')
        arguments.append(params)

        arguments.append(unicode(self.getParameterValue(self.INPUT)))
        arguments.append(unicode(self.getOutputValue(self.OUTPUT)))

        GdalUtils.runGdal(['gdal_grid',
                          GdalUtils.escapeAndJoin(arguments)], progress)
